Wind display device for locomotion interface in a virtual environment

Kulkarni, Sandip D.; Fisher, Charles J.; Pardyjak, Eric R.; Minor, Mark A.; Hollerbach, John M.

doi:10.1109/whc.2009.4810855

Cited by 19 publications

(6 citation statements)

References 14 publications

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“…Previous studies on scaled system showed promising results [6][7][8][9]. Key features of the full-scale system adapted from scaled system and the major difficulties and features that required modifications are stated below.…”

Section: Major Modifications From Scaled Modelmentioning

confidence: 99%

“…Since the display screens are being used to guide the flow, an examination of the effect of wind loading due to dynamic pressure on the screens is essential. A finite element analysis of the pre-existing screens due to the addition of the wind tunnel, using ANSYS, estimated screen displacements of ~29 cm for the original constraints and 1.1 mm for thicker (1.9 cm) screens and modified constraints [8,12]. Experimental measurements using dial indicators measuring screen displacement for a range of steady operating fan frequencies on the fully built TPAWT system demonstrated that the pressure profiles on the screen and the resulting deflections are much lower-in a range of 0.2 to 2.5 mm with the existing screens, Table 4.…”

Section: Effect Of Wind On Display Screensmentioning

confidence: 99%

“…We first developed a quarter-scale two-dimensional model of the TPAWT to prototype the design approach [6][7][8][9], based on computational fluid dynamics (CFD) models and control theory. Experimentation led to controller development for wind velocity at the user position and to understanding flow dynamics inside the TPAWT environment.…”

Section: Introductionmentioning

confidence: 99%

“…designing a unique low turbulence air flow system (with specialized inlets and outlets [10] ) to overcome spatial constraints, 2. integrating and modifying algorithms to control wind velocity at the user based upon inlet flow velocities (similar to [7]), 3. designing throttle valves in the ducts based upon these inlet velocities (detailed in [11]), 4. testing display screens [8,12] and auditory levels [13] for safety, and 5. evaluating the effect of a user on the flow dynamics.…”

Section: Introductionmentioning

confidence: 99%

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A Full Body Steerable Wind Display for a Locomotion Interface

Kulkarni

Fisher

Lefler³

et al. 2015

IEEE Trans. Visual. Comput. Graphics

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This paper presents the Treadport Active Wind Tunnel (TPAWT)-a full-body immersive virtual environment for the Treadport locomotion interface designed for generating wind on a user from any frontal direction at speeds up to 20 kph. The goal is to simulate the experience of realistic wind while walking in an outdoor virtual environment. A recirculating-type wind tunnel was created around the pre-existing Treadport installation by adding a large fan, ducting, and enclosure walls. Two sheets of air in a non-intrusive design flow along the side screens of the back-projection CAVE-like visual display, where they impinge and mix at the front screen to redirect towards the user in a full-body cross-section. By varying the flow conditions of the air sheets, the direction and speed of wind at the user are controlled. Design challenges to fit the wind tunnel in the pre-existing facility, and to manage turbulence to achieve stable and steerable flow, were overcome. The controller performance for wind speed and direction is demonstrated experimentally.

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Section: Major Modifications From Scaled Modelmentioning

confidence: 99%

Section: Effect Of Wind On Display Screensmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Full Body Steerable Wind Display for a Locomotion Interface

Kulkarni

Fisher

Lefler³

et al. 2015

IEEE Trans. Visual. Comput. Graphics

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“…This system consists of the integration of the TreadPort locomotion interface (Hollerbach et al 2000) with a wind tunnel for atmospheric display (Kulkarni et al 2009(Kulkarni et al , 2012. The TreadPort is composed by a CAVE-like visual interface, as well as a harness and a treadmill that provide accurate locomotion forces as a user walks through a virtual environment.…”

Section: Virtual Realitymentioning

confidence: 99%

Designing presence for real locomotion in immersive virtual environments: an affordance-based experiential approach

Turchet

2015

Virtual Reality

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This paper describes a framework for designing systems for real locomotion in virtual environments (VEs) in order to achieve an intense sense of presence. The main outcome of the present research is a list of design features that the virtual reality technology should have in order to achieve such a goal. To identify these features, an approach based on the combination of two design strategies was followed. The first was based on the theory of affordances and was utilized to design a generic VE in which the affordances of the corresponding real environment could be evoked. The second was the experiential design applied to VEs and was utilized to create an experience of locomotion corresponding to that achievable in a real environment. These design strategies were chosen because of their potential to enhance the sense of presence. The proposed list of features can be utilized as an instrument that allows VE designers to evaluate the maturity of their systems and to pinpoint directions for future developments. A survey analysis was performed using the proposed framework, which involved three case studies to determine how many features of the proposed framework were present and their status. The result of such analysis represented a measure of the completeness of the systems design, of the affordances provided to the user, and a prediction of the sense of presence.

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